Nathaniel 'Nat' Rothschild

Current whereabouts and activity: Besides the whole sauna situation, Nat was co-chairman of the hedge fund Atticus Capital from 1996 until it ceased activity in 2009. He now lives in Switzerland a majority of the time and runs JNR Limited, an advisory business focused on emerging markets natural resources transactions. He is co-chair of Bumi Plc, an Indonesian mining company listed on the London Stock Exchange. He was also reported to be friends with Muammar Qaddafi's son Saif.

Lineage: The youngest of four children and only son of Jacob Rothschild, 4th Baron Rothschild and Serena Mary Dunn.

David Mayer de Rothschild

Current whereabouts and activity: environmental activist and adventurer. Head of Adventure Ecology, a group that raises awareness of climate change. Author of the book The Live Earth Global Warming Survival Handbook: 77 Essential Skills to Stop Climate Change—Or Live Through It. Sailed a boat, the Plastiki, made entirely of recycled plastic bottles and other reclaimed materials, from San Francisco to Sydney in 2009. Currently lives in California.

Lynn Forester de Rothschild

Current whereabouts and activity: CEO of E.L. Rothschild, a holding company with investments in a range of media properties including the Economist Group. She was a major fundraiser for Hillary Clinton in 2008 and gained notoriety for subsequently endorsing John McCain. She splits time between New York and London.

Leopold David de Rothschild

Current whereabouts and activity: financier, music lover and benefactor. Has become an accomplished pianist and violinist and is a trustee of numerous British classical music organizations. Former director of the Bank of England and current director of the family's merchant bank.

Emma Georgina Rothschild

Emma Rothschild with her husband, economist Amartya Sen
AP Images

Current whereabouts and activity: economic historian at Harvard and is an honorary professor at Cambridge. She also serves as a trustee to the Rothschild Archive, a London-based center for research into the family. She is married to the Nobel-prize winning economist Amartya

Édouard Etienne Alphonse de Rothschild

Current whereabouts and activity: a member of the French wing of the family, he owns a share of the Lafite vineyard and is an avid horse enthusiast. In 2005 he invested approximately $28 million in the left-wing Parisian newspaper Libération.

Baron David René James de Rothschild

Current whereabouts and activity: Chairman of Rothschild Continuation Holdings, based in Switzerland and former chairman of De Beers. He lives in Normandy in the heart of French horse country near his brother Edouard.